Richard Glossip was convicted in 2004 in a murder-for-hire scheme in Oklahoma City. The executioner will inject the same three drugs used to kill Clayton Lockett but will use a higher dosage.

Lockett's death became national news after the drugs failed to kick in quickly.

Could the drugs face problems again? Glossip said he's worried his execution will be botched.

"I’m afraid of how they'll kill me," he said in a phone interview.

Glossip is on death row for ordering an execution. He hired a co-worker to kill his boss.

On Jan. 7, 1997, Oklahoma City officers were called to the Best Budget Inn (now Super 40 Inn) on Council just off of Interstate 40. Inside room 102, they found the badly beaten body of the hotel owner.

Justin Sneed, the hotel maintenance man, confessed to beating Barry Alan Van Treese with a baseball bat. He was convicted and sentenced to life in prison.

Sneed told authorities Glossip offered him $10,000 to kill Van Treese. According to court records, Glossip worried he'd soon be fired for embezzling from the hotel.

Glossip maintains his innocence to this day.

In April, Lockett moaned for 43 minutes after drugs were administered. He eventually died of a heart attack.

His execution, one of the longest in U.S. history, halted all executions in Oklahoma while the protocol was investigated.

Oklahoma spent $71,000 renovating the death chamber. Despite continued protests the process still runs a substantial risk of severe pain and a lingering death, executions have resumed.

On Thursday, Charles Warner was executed with the new three-drug formula without any apparent complications. Glossip’s execution is set for Jan. 29.

Two more Oklahoma death row inmates have an execution date set.

John Grant is set to die Feb. 19. He stabbed a prison kitchen worker to death with a screwdriver.

Benjamin Robert Cole Sr., convicted of killing his 9-month-old daughter, is scheduled to die on March 5.